摘要
为了深入研究大倾角厚煤层大采高工作面顶板垮落特征,理论计算了25213大倾角大采高工作面顶板各岩层载荷,并采用理论分析、相似材料模拟实验和FLAC3D数值模拟相结合的方法,研究了25213工作面顶板垮落规律,初步确定了25213工作面直接顶初次垮落步距24m左右,基本顶初次垮落步距57m左右,基本顶周期垮落步距24m左右,对工作面后期的安全回采和矿压控制具有重要的借鉴意义。
In order to deeply study of roof collapse character of large mining height working face under large incline angle coal seam,and every stratum loading of roof of 25213 working face with large mining height and large incline angle,and then theory analysis,simulation experiment and FLAC3 Dnumerical simulation were applied,and roof collapse law of 25213 working face was studied,the initially collapse space of immediate roof of 25213 working face was 24 m,the initially collapse space of main roof was 57 m,periodic collapse span was about 24 m,it references for safety mining and mine pressure control of working face.
出处
《煤矿开采》
北大核心
2017年第5期71-74,56,共5页
Coal Mining Technology
基金
国家自然科学基金重点项目(51634007)
关键词
大倾角
大采高
顶板垮落规律
数值模拟
周期垮落步距
large incline angle
large mining height
roof collapse law
numerical simulation
periodic collapse span
